I am planning to attach a 6V 100mA Solar Panel to a Step Up USB Charger you can see at this link, and yes I know it can only be charged during the day... that is OK.
Considering that most phone batteries today are at least 2000 mAh, would connecting two solar panels in parallel speed up the charging? In other words, does amperage of input into the booster have a direct correlation to the output amps, or would it be inefficient?
I updated the link to a different product that can give up to 2A of output current and takes up to 5.5V input. I plan to connect the two solar panels in parallel to the Step Up USB module. I will connect one end of a regular USB to the step up module and the other to the phone.
I realise that I am wasting power when I am not charging my phone. Perhaps I'll do that in my next DIY.